Parachute rip cord receding cone



NOV. i4, 193. G,A A JAHANT 2,179,506-

PARACHUTE RIP CORD RECEDING GONE Filed Aug. 18, 1958I,IllllllllI/IIAVIIIIIIIIIVII INVENTOR GEORGE A, JAHANT Bmw/0%@ ATTORNEYPatented Nov. 14, i939 HCE 2,179,506 EAlitACHU'iii'J RIP COR-D RECED-HNGCNE George A. Jahant, United States Marine Corps appli-manen August is,rasa ser-iai Ne. 225,573

5 Claims. (Cl. Zai-148) (Granted under the act of March 3, i883, asamended April 30, 1928; 37) 0.. G. 757) This invention relates to areceding cone esflap l i of: the pack in order to hold the parapeciallyintended for use with a pin of a parachute chute within the) flap. Thisoverlapped flap I is rip oord, and has for an object to provide animvided witira grommet I2 through which is to proved cone which assistsin holding the rip extend a cone I3 having a rip cord pin receiving .3cord pin securely in operative position with the aperture M near itsapex. The rip cord pin Iii 5i parachute pack flaps in proper cooperativereaextends through aperturel it to hold the flap I9 tion and which, whenthe pin is removed by opin overiapped position with the flap II. In theeration of the rip cord, will immediately recede presentconventional'parachute pack the cone i3 from the overlapped parachutepack flaps, thereis mounted nxedly on the underlying flap II.

l@ by releasing the flap more qinckly than with the With the presentinvention the cone I3 is provided 10 present type oi cone and permittingthe parawith a footed base iii against which bears a comchute pack tcopen more Quickly and more posipression spring li whose other end bea-rsagainst tively the bottom or" a grommet 8 on the flap II. A

in the operation of a parachute fractions of a well i9 in whichv thecone i3 extends is secured l5 second between the time the cord is pulledby a fastening 2d tothe bottom ofthe flap iI, the 15 andthe parachutecomes into operation may often faste-ning im also extending through theflap H mean the dierence between liie and death for and serving tolikewise secure the grominet I8 the In the-ordinary typey of parachutepack thereto. The cup shaped well I9 serves to limit the cone ispie-.ced on one flap of the pack and the motion. that the compressionspring II can go extends through a grorninct in an overlapped iiap,press the cone i3 away from the opening in the 20 the overlapped whichholds the parachute invii-through grommet i8. The well I9 is prefwithinthe pack being held in such overlapped eldlyof such av size that whenthe cone i3 is position by the pin of the parachute rip cord eX- heid inreceded position in the weil I9 the tip of tending through an opening inthe con-e tip above the cone I3 will be just barely below the upper 5.35the overlapped flap. when the rip cord is pulled Surface 0f the gmmmeI3. 25 to withdraw the pin the overlapped fiap must In operation; afterthe parachute is properly more outwardly away from the underlying applaced within the pack, the flap Ei) is drawn over having the extendingcone, thereby deiaying the th@ fLlOy ii, Dlnglthe grommets i2 andil intime for opening the pack, and further providing proper alignment. Therip cord pin I5 is then inso a'pessioiuty that the nap may jam againstthe Serted-tiirough the erommet I8 so as t0 enter the 30 cone stillextending therethrough and fail to move Opening It in cone I3, therebydrawing it upaway in the proper direction under the force of wardiy fromthe position shown in Fig. 2 to the the usual elastic bands fastenedthereto. position shown in Figs. 1 and 3, enabling the In this inventionthe cone automatically and pin i5 to be advanced tluoush the @oneopening immediately recedes from interengaging position i@ until itbridges the Opening in the glOImnet 35 with the overlapped flap when therip cord pin is i2. The Spring I7 S Compressed by this action withdrawn,thereby permitting the overlapped and serves to cause the cone I3 toexert suiicient iiap to withdraw itself in the direction of the frictionOIl the pin l5 t0 DTGVSH it flOm acciforce exerted by the elastic band,making it undentally withdrawing therefrom. When the par- 4:0 necessaryfor the ap to come around the corachute is to be released the rip cordis pulled 40 ner, in effect, in order to release itself. in the usualmanner, easily withdrawing pin l5 With the foregoing and other objectsin view, from engagement through the cone I3, wherethe inventionconsists in the construction, comupon spring Il causes the cone I3 toimmediately bination and arrangement oi parts hereinafter derecede frOmX'e11'd11g hTOugh the gIOmIIlet i5 scribed and illustrated in thedrawing, in which, opening in iap l to below the level of grommet 45Fig. l is a sectional view of the receding cone It within the well I9.The flap Ill is thus left of this invention in operative parachute packlee t0 be Withdrawn by the usual elastic band flap holding position. ina direction more or less parallel with the plane Fig. 2 is a sectionalView with the cone receded Of the flap il, making it unnecessary for theafter the rip cord pin has been withdrawn; and flap to come around thecorner as it would have 50 Fig. 3 is a sectional view similar to Fig. 1,but to if the cone i3 still remained in a position prowith the coneshown in elevation, with the gromjecting through the gromrnet I2 as itdoes with met threaded into the well. the conventional type of parachutepack. The

There is shown at it the overlapped flap of a flap I is thereby freefrom the possibility of jamparachute pack which is held over theunderlyming against the side of the cone and Will be 55 more positiveand rapid in parachute releasing operation.

In the form shown in Fig. 3 the grommet I8 is provided with a dependingexternally threaded flange 2l which cooperates with an internal thread22 on the well I9' to thereby secure both the grommet I3 and well I9' tothe flap Il. Otherwise, the construction and operation of this form isidentical with that of the rst form.

Other modications and changes in the proportions and arrangements of theparts may be made by those skilled in the art Without departing from thenature of the invention, within the scope of what is hereinafterclaimed.

The invention described herein may be manufactured and used by or forthe Government of the United States of America for governmental purposeswithout the payment of any royalties thereon or therefor.

Having thus set forth and disclosed the nature of this invention, whatis claimed is:

'1. For use with a parachute pack ap and a parachute rip cord pin, anapertured rip cord receiving cone, means for mounting said cone causingit to recede from flap interengaging position when the rip cord pin iswithdrawn, said means comprising a spring normally urging said conetoward withdrawn position, and a rigid Well within which said cone andspring are mounted, said well limiting` the recession of said cone.

2. For use with a parachute pack flap and a parachute rip cord pin, anapertured rip cord receiving cone, means for mounting said cone causingit to recede from ap interengaging position when the rip cord pin iswithdrawn, Said means comprising yieldable means normally urging saidcone toward withdrawn position, a rigid well within which said cone andyieldable means are mounted, said well limiting the recession of saidcone, a grommet partially overlying said well, a footed base on saidreceding cone, said yieldable means comprising a lcompression springabout said cone between said grommet and said footed base on said cone.

3, For use with a parachute pack ap and a parachute rip cord pin, anapertured rip cord receiving cone, means for mounting said cone causingit to recede from flap interengaging position when the rip cord pin iswithdrawn, said means comprising yieldable means normally urging saidcone toward withdrawn position, a rigid well within which said cone andyieldable means are mounted, said well limiting the recession of saidcone, a grommet partially overlying said well, a footed base on saidreceding cone, said yieldable means comprising a compression springabout said cone between said grommet and said footed base on said cone,and means for securing said grommet to said well on opposite sides l ofthe parachute flap.

4. For use with a parachute pack flap and a parachute rip cord pin, anapertured rip cord receiving cone, means for mounting said cone causingit to recede from flap interengaging position when the rip cord pin iswithdrawn, said means comprising yieldable means normally urging saidcone toward withdrawn position, a rigid well within which said cone andyieldable means are mounted, said well limiting the recession of saidcone, a grommet partially overlying said well, a footed base on saidreceding cone, said yieldable means comprising a compression springabout said cone between said grommet and said footed base on said cone,and means for securing said grommet to said well on opposite sides ofthe parachute flap, said securing means comprising a dependingexternally threaded flange on said grommet and an internal cooperatingthread on said Well.

5. For use with a parachute pack ap and a parachute rip cord pin, anapertured rip cord receiving cone, means for mounting said cone causingit to recede from flap interengaging position when the rip cord pin iswithdrawn, said means comprising yieldable means normally urging saidcone toward withdrawn position, a rigid well within which said cone andyieldable means are mounted, said well limiting the recession of saidcone, a grommet partially overlying said well, a footed base on saidreceding cone, said yieldable means comprising a comression spring aboutsaid cone between said grommet and said footed base on said cone, andmeans for securing said grommet to said well on opposite sides of theparachute flap, said means comprising a flexible member sewed throughsaid grommet and ap and a portion of said well.

GEORGE A. JAHANT.

